Original Website © Amplabs 2009 This new site created April 2018
metal film resistors, polyester/polypropylene film capacitors, low noise, high beta transistors, and new diodes/rectifiers.
What we do:
After verifying that your 33 'parts to keep' are in good condition (we inform you if they are not); we strip all the existing
components from the seven PCB boards.* We then clean off the solder and flux residue and re-populate each board with
new high quality components. For example, the resistors we use are 1% metal film types. This allows the DC operating
points and gain setting components to be optimised and reduces the inherent noise. Likewise for the capacitors and
The legend light is modified to a white diffused LED circuit. This gives a pleasing clean looking legend. If you prefer the
original 'dull lamp orange' we can fit an orange led instead.
We modify some components in value and rating to improve performance, this includes the PSU smoothing capacitors,
rectifiers, bias resistors and response tailoring components. Nothing drastic, just sensible improvements so the system still
has the smooth original sound as it was when first un-boxed.
The push button switches are individually dismantled, contacts cleaned and reassembled. A similar dismantling action is
carried out on the slider pot. If the switched volume control and tone pots are in good working order, we clean the wipers
and tracks with IPA. If not, they are replaced with modern nylon spindle controls. The edge connectors are checked for
integrity and cleaned.
Everything is then assembled back in place and the system is then checked for correct operation on. Finally a full listening
test , PAT and bench soak test is carried out.
As you can imagine this is a labour intensive operation but the end result makes the increased outlay very worthwhile.
Quad 33 Full Component Replacement (Q33FCR)
For ure listening pleasure